520285855 has 4 divisors (see below), whose sum is σ = 624343032. Its totient is φ = 416228680.

The previous prime is 520285849. The next prime is 520285861. The reversal of 520285855 is 558582025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (520285849) and next prime (520285861).

It is not a de Polignac number, because 520285855 - 2³ = 520285847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52028581 + ... + 52028590.

It is an arithmetic number, because the mean of its divisors is an integer number (156085758).

Almost surely, 2^520285855 is an apocalyptic number.

520285855 is a deficient number, since it is larger than the sum of its proper divisors (104057177).

520285855 is a wasteful number, since it uses less digits than its factorization.

520285855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104057176.

The product of its (nonzero) digits is 160000, while the sum is 40.

The square root of 520285855 is about 22809.7754263386. The cubic root of 520285855 is about 804.2924765921.

The spelling of 520285855 in words is "five hundred twenty million, two hundred eighty-five thousand, eight hundred fifty-five".